<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>01-let</title>
</head>
<body>

</body>
<script>
       /*{
            const a=3;
            a=4;

            const b;
        }*/

       let a =1;
       const b =2;
       var c =3;

       console.log(window.a)
       console.log(window.b)
       console.log(window.c)

</script>
</html>